Internal-combustion motor.



s106111. INTERNAL COMBUSTION MOTOR. APPLICATION FILED AUG-1, i911.

Patented Apr'. 13, 1915.

2 SHEETS-SHEET 1.

A MEW/f' Wmme www? m 1 LOGAN.

INTERNAL COMBUSTION MOTOR APPElcATloN FILED AuGJ, |911.

Patented Apr. 13, 1915.

n.396 mtothminok Z0 mmbtml mue/Moz SYM/ESTER LOPN tisanes.

mlllllllm SYLVESTER LOGAN, 0F FRANKLIN, PENNSYLVANIA, ASSIGNOR, BYDIRECT AND MESNJE lASSIGNMENTS, OF `ONE-HALF T0 LOWE E. SIMPSON ANDONE-HALF TO DEVILLE SIMPSON, BOTH 0F CINCINNATI, OHIO. Y

INTERNAL-COMBUSTION MOTOR.

To all t0/0m it may concern Be it known that I, SYLvEs'rER LOGAN,citizen of the United States, residing at Franklin, in the county ofVenango and State of Pennsylvania, have invented cer! tain new anduseful Improvements in Internal-Combustion Motors, of which thefollowing is a specification.

The object, construction and operation of my improved motor are hereinset forth with suicient clearness to enable those skilled in the art towhich it appertains to make and use the same.

In the drawings, I have shown one construction by means "of which myinventive idea may be mechanically, embodied, but said drawings areconsidered by me to be illustrative merely as there are several otherforms of construction whereby said idea may be rendered practicable.

The object of this invention is, to provide an internal combustion motorof the four-stroke cycle type, wherein valves of the usual type, whichrequire a certain amount of power for their operation, are dispensedwith,` land pistons of a novel construction and arrangement, which contribute to the power output of the engine,l

are substituted in the place thereof.

lBriely stated, my invention consists in the novel combination of threepistons, arranged to be each acted upon by the pressure developed in asingle combustion chamber, two of said pistons being adapted ascontrolling means for the inlet and ex haust ports communicating withsaid chamber, together with suitable mechanical elements, such asconnecting rods, crank shafts, etc.. for converting said pressure intoavailable power.

The various figures of the drawings are as follows Figure 1 is a centralvertical section through my improved motor, showing substai'itially therelative positions which the pistons occupy during a portion of the eX-haust stroke of the primary piston.` Fig. 2 is the same section. showingsubstantially the position which the pistons'occupy during the intakestroke of the primary piston. Fig. 3 is a diagram showing the positionand 'travel ot' the several pistons throughout the various functions ofa complete cycle,

Specification of Letters Patent.

Application led August 7, 1911.

Patented Apr. 113, MM5. Serial No. 642,697.

also the relative positions of said pistons at all times.

The construction shown in the drawings is substantially as follows :-I,construct a primary cylinder 1, in which a piston of the u'sual typeoperates,and which is connected by means of a connecting rod 3 to acrank shaft which is designed to revolve in the direction indicated bythe arrow. rllhis primary piston operates upon the four-stroke cycle.Within a secondary cylinder 5 ll place two pistons,a secondarysleeve-piston G -and a tertiary piston 7, which are connected by meansof connecting-rods 6 'and 7 to two cranks upon the crank-shaft 8, andthe tertiary or inner piston 7 has a stroke which is preferably abouttwice the length of the stroke ot' the secondary piston (3. Pistons 6and 'Rare so proportioned that they present substanvtially the saineamount of area to the ex- Through the wall of the secondary cylinder isformed an exhaust port 11. also an inlet port 12, and through the wallof the secondary piston is also formed anginlet passage 12.

Duringthe exhaust function of the motor the pistonsoccupy substantiallythe posi-l tions shown in Fig. 1. in which the exhaust port is uncoveredby the upper end of tho secondary piston as it moves downward past thesame,` thus permittiiig the free escape of the products of combustion.Bv a referenee to Fig. 3 it will be noted that during ,the exhaustfunction` the primary piston travels upward, the secondary piston trav,-els both downward and upward through the lower quarter of its stroke.and the tertiary piston travels downward through then` lower quarter ofits stroke.' lt may also be seen by a reference to Fig. 3 that duringthe intake stroke the pistons all occupy suhstantiallythe position shownin Fig. Q. at

' '.practicaladjunct to this, 'the idea also 1nwhich time the intakepassage 12 in. the secondary piston is in communication or re 'strywiththe intake port 12 in the'cylin er wall, the tertiary piston 7 beingpositioned so as to uncover the inner end of said port v12', thusaffording free ingress for the fuel supply to the combustion chaml ber.1

By again referring lto Fig. -3`it will be noted that the movements ofthe various pistons during the intake function are as follows: The mainpiston 2 is moving downward, and the secondary piston 6, also thetertiary piston 7 are moving upward. The principal .and beneficialpoint, however, in the action vof the pistons, and the one which causesthem all Vto contribute to the power output of the motor and to increaseits mechanical efiicien'cyover others, lisv the fact-that all of thepistons actin response to andin harmony with the impulse'v to Fig.3,-and thus all contribute to the' power output `and mechanicalefficiency of the motor.

lllihilejgtzlne secondary piston is here referred toasiv a'-sleeve-piston, it should be carefully noted thatl it is not suchjanelement as iscommoniytermed in this art as 1a. sleeve, for thereason-that the elements commonly termed sleeves in this art, arev i"simply valves, and perform functions as such only, whereas mysleeve-pistonnotonlyy` performs valve functions, but in 'additionthereto it'is adapted to be and is acted upon 'and actuated by theexpansive force4 developed in the 'combustion chamber and cooperateswith the other pistons in converting said force into available power.

The drawings are intended to be illustrative of the inventive idea aboveset forth, Vviz :-that the expansive force developed by the combustionoffuel in a single combustion'chamber common to two cylinders of amotor, 'may be active upon at least three pistons, so arranged that theyall act in response to and in harmony with such expansive force in saidchamber, and are actuated thereby'thuslall contributing to the poweroutput of the motor; and as a necessary scope of my invention.

ber, a piston operative in said first cylinder,

here shown only, as these particulars might be reversed as to saidlpistons, and other details of construction might be considerablymodified without departing from the Any suitable form of ignition plugmay 7 be inserted in the tap-hole 13 provided therefor.

I claim- 1. In a motor, the combination of a chamber adapted to containan expansive fluid, a first cylinder having communication with saidchamber, a second cylinder oii'set from said first cylinder and havingcommunication at one end with said chamtwo pistons operative in saidsecond cylinder, said two pistons being arranged as controlling meansfor the inlet port and for thel exhaust port which extend through thewall of said second cylinder, all three of said pistons -being adaptedto be actuated by the expansiveforce of the fluid within said chamber,and means for converting said actuation into available power.

2. A four-cycle gas engine comprising a valve-casing havin one endconstantly in communication wit the combustion chamber of the engine andprovided with a fuel inlet port and provided with an exhaust port nearersaid combustion chamber, a first valve member working in said valvecasing and adapted to have its end coperate with the before mentionedexhaust port and provided with an inlet port to coperate with the first100 mentioned inlet port, a second valve member having its end adaptedto cooperate with vthe inlet port of the first valve member, and

valve moving mechanism actuated by thc englne and adapted to move thetwo valve members differentially and to give the two lvalve members oneimpulse for each two impulses of the engine.

3. A four-cycle gas engine comprising a valve casing havin one endconstantly in communicationwiti the combustion chamber of the engine andprovided with a fuel inlet port and provided withv an exhaust portnearer said combustion chamber, a first valve member working in saidvalve casing and adapted to have its end coperate with the beforementionedexhaust port and provided with an inlet port to coperate withthe first mentioned inlet port, a second valve member having its endadapted to coperate with the inlet port of the first valve member, andvalve movin mechanism actuated by the engine at hal the speed of vtheengine-and adapted to move the two valve members differentially so thatthe movement of the first valve member effects the opening ofthe inletport to the valve casing, and the movement of the second valve membercloses the inlet to the valve casing.

4. A four-cycle gas engine comprising a nieaeae cylindrical valve casinghavin one end cony stantly in communication wit the combustion chamberofthe en 'ne and provided with' a fuel inlet port an provided with ariexhaust port nearer said combustion chamber, a rst cylindrical valvemember working in said valve casing and adaptedv to have its endcoperate with the before mentioned exhaust port and provided with aninlet port to coperate with the'rst mentioned inlet port, a cylindricalsecond valve memn ber having its end adapted to coperate with the inletport of the first valve member, and valve moving mechanism actuated bythe engine and adapted to move the two valve members diderentially andto give the two valve members one impulse for each two impulses of theengine.

" 5. A four-c cle-gas ccmprisin a valve casing disposed substantiallaralal with and having one end constant y 1n communication with thecombustion chamber c? the engine andv provided with an inlet vport andprovided with anexhaust port nearer said combustion chamber, a 4firstvalve member working in said valve n and adapted to have its .endcoperate wit the bef mentioned exhaust port and provided with an inletAport to coperate withrtherst men-A tioned inlet port, a second valvememr havin its end adapted to coperate with thei et port ofthe rst valvemember, and fvalve moving mechanism actuated by the engine and adaptedto move the two `,valve members ldiderentially and to give the two fvalve members one impulse for each two im- Alll pulses of the ene.

6.- A four cycle gas `engine comprising a combustion chamber, a maincylinder 'communicating with said chamber, a valve casing having oneendv constantly in communication with said combustion' chamber, the

axis of said .valve casing beingv odset fr om the main cylinder,thevalve casing being Erovided with an .intake port and an exe aust portnearer to the combustion cham-Y l ber, two valve members working in saidldierentially and to ve them one leasing and adapted to coperate witheach other and with id ports and without the agency of anyv additionalstationary member, `whereb mechanism actuated by the n A adapted to moveAthe two valve for euch two impulses of the n z till 7. ln a` gasengine, the combinanon of a dcombustion chamber, a main cylinder and' avalve cylinderarranged to one side of the main cylinder, said valvecylinder counicating with said combustion chamber at 'tlm li the inletof fuel to and the@ exhaust of' urnt ases om said combusn 'tion chamberareeected, an valve movin one end, the valve cylinder being provided lwith a supply andan exhaust port entering it directly through one of itswalls, a main piston in the main cylinder, a valve sleeve in the valvecylinder `directly coperating with the walls thereof and w1th saidports, a valve piston within'said valve sleeve 'and directl coperatingwith the`sleeve walls, the va vesleeve being rovided with a port throughone of its wa ls directly coperatwith said valve piston and sald inletand il aust ports, a crank shaft and connections between the same .andsaid main piston,

valve sleeve and valve piston to cause said 'sleeve and valve piston tomove diderentially and to re late the intake and exhaust in relation tot e main piston.

8. A four-c cle gas engine comprising a cylindrical vave casing havinone end constantly in communication wit the combustion chamber of theengine, and provided witha fuel-inlet port, and provided with anexhaust-part nearer to said combustionchamber, a rst cylindricalvalve-member working in ksaid casing and Yprovided with a passageadapted to coperate directly with said ports, a cylindrical secondvalve-member havin its end adapted to co erate directl wit'the passageinl the rst valve mem er, andl valve moving mechanism accylinricalvalvemember having its end adapted to coperate with the assage `in"valve-member, and va ve-movin mechani actuated b the en'ne, adapte tomove *said two va ve-memrs (lider-entially and to give to d twovalve-memmrs one impulse .for each two impulses of the ,it both of' saidvalves being arranged rVadap to coact with themotor-piston in the new ofthe lesive force shaft of within the the motor. Y

i anon whereof ll affix my signature s :s 0 0 Witlu SYLVESTER LOGAN.

cyder, vto the c t u

